Foil-condenser



(No Mo'del.)"

W. H. PQMEROY. v

FOIL CONDENSER. No. 345,724. I Patented July 20, 1886.

N. PETERS, Phom-Lilho m nn, Waahinglun. n. c.

UNITED STATES PATENT OFFICE.

WILLIAM H. POMEROY, OF GLOUCESTER, MASSACHUSETTS.

FOIL-CONDENSER.

SPECIFICATION forming part of'Letters Patent No. 345,724, dated July 20,1886.

Application filed September 17, 1885. Serial No. 177,401. (No model.)

To all whom/it may concern:

Be it known that I,WILLIAM H. PoMERoY, of Gloucester, in the county ofEssex and State of Massachusetts, have invented certain new and usefulImprovements in Foil-Condensers, of which the following is aspecification.

The objects of my invention are to provide a cheap, simple, convenient,and expeditious foil-condenser, adapted for use in a dental engine,whereby the foil employed in filling the cavities of teeth may becompacted therein in a rapid manner; and it consists in a suitable caseadapted to be connected with the chuck or hand-piece of any dentalengine, whereby rotary motion may be communicated to the operatingmechanism contained within the case, whereby an automatic hammer may beactuated so as to strike a series of blows in rapid succession, and theforce thereof be con trolled and varied as occasion may require, ashereinafter more fully described, and set forth in the claim'heretoannexed;

Figure 1 represent'sa side elevation of a foilcondenser constructedaccording to my invention. Fig. 2 represents a perspective view of thehammer removed from the tubular case. Fig. 3 represents a similar viewof the cam, spindle, and guide-block. Fig. 4 represents a longitudinalsectional view of the shell-case, showing the hammer in position afterthe blow has been struck. Fig. 5 represents a similar view showing thehammer in position to strike the blow. Fig. 6 represents a minor detailof construction. I

A represents a tubular case, provided at one end with a holding plug ortip, B, into which is inserted any suitable plugger or condensing-tool,0, adapted for compressing foilwithin the cavity ofa tooth, as desired,and the opposite end is provided with a split sleeve, D, surrounding theoutward end portion of the spindle E,adapted to fit into and over thehand, piece of a dental engine, whereby it may be rotated within thesaid tubular case A, where its opposite inward end has a pivotal bearingwithin the stationary guide-block F, secured within said case Aby ascrew, t, and provided with a groove near its end, into which is fittedthe end of ascrew or pin, S, passing through the said guide-block F, asshown in Fig. 6. This spindle E is pivoted within the center of theguide-block F, which is provided at one side with a longitudinal groove,through which the guide-bar J of the hammer H reciprocates, or slidesback and forth, through the action of the semi-screw-cam L, providednear the lower or inward end of the pivoted spindle E, which, whenrotated, engages with the face of the projection c, and thereby raisesor slides the said hammer H and its guide-bar J, so as to compress thecoiled or spiral spring K, one end of which has a bearing against thecap 0 of the said guidebar, and its opposite end against thescrew-threaded inward end of the adjustable sleeve D. Now, when theprojection e is brought opposite the vertical or straight longitudinalface a of the said cam L, it is forced by the recoil of thesaid spiralspring K suddenly in the opposite direction, causing the hammer portionH to strike a blow against the said plug-tip B, the concussion of whichis thereby imparted to the said compressing-tool O, which, being placedupon or in contact with foil inserted within the cavity of a tooth,compacts or condenses itin a rapid manner, a blow being given at eachrevolution of the said spindle and cam through the motion impartedthereto by means of the dental engine run by the foot of the operator,or in any other suitable manner, so as to cause a succession of blows tobe struck,'the force of which being regulated by means of thescrewthreaded portion of the sleeve D and case A, by which means thesaid spiral spring K may be more or less compressed, or made to bearwith more or less force upon the hammer or striking mechanism, as abovedescribed.

Having thus described my invention, what I claim is- The combination,with the case A, having the tip B, of the spindle E, cam L, guide-blockF, hammer H, guide bar J, having the projection e, the cap 0, spring K,and adjustingsleeve D, as described.

WILLIAM H. POMEROY.

NVitnesses:

WILLIAM H. ALLEs, SIMEON H. WILLIAMS.

